Cita APA (7th ed.)

Eilers, L. J., & Roosa, D. M. (1994). The vascular plants of Iowa: An annotated checklist and natural history. University of Iowa Press.

Cita Chicago (17th ed.)

Eilers, Lawrence J., i Dean M. Roosa. The Vascular Plants of Iowa: An Annotated Checklist and Natural History. Iowa City: University of Iowa Press, 1994.

Cita MLA (9th ed.)

Eilers, Lawrence J., i Dean M. Roosa. The Vascular Plants of Iowa: An Annotated Checklist and Natural History. University of Iowa Press, 1994.